1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <fstream>
11 
12 // template <class charT, class traits = char_traits<charT> >
13 // class basic_ofstream
14 
15 // template <class charT, class traits>
16 //   void swap(basic_ofstream<charT, traits>& x, basic_ofstream<charT, traits>& y);
17 
18 #include <fstream>
19 #include <cassert>
20 #include "platform_support.h"
21 
main()22 int main()
23 {
24     std::string temp1 = get_temp_file_name();
25     std::string temp2 = get_temp_file_name();
26     {
27         std::ofstream fs1(temp1.c_str());
28         std::ofstream fs2(temp2.c_str());
29         fs1 << 3.25;
30         fs2 << 4.5;
31         swap(fs1, fs2);
32         fs1 << ' ' << 3.25;
33         fs2 << ' ' << 4.5;
34     }
35     {
36         std::ifstream fs(temp1.c_str());
37         double x = 0;
38         fs >> x;
39         assert(x == 3.25);
40         fs >> x;
41         assert(x == 4.5);
42     }
43     std::remove(temp1.c_str());
44     {
45         std::ifstream fs(temp2.c_str());
46         double x = 0;
47         fs >> x;
48         assert(x == 4.5);
49         fs >> x;
50         assert(x == 3.25);
51     }
52     std::remove(temp2.c_str());
53     {
54         std::wofstream fs1(temp1.c_str());
55         std::wofstream fs2(temp2.c_str());
56         fs1 << 3.25;
57         fs2 << 4.5;
58         swap(fs1, fs2);
59         fs1 << ' ' << 3.25;
60         fs2 << ' ' << 4.5;
61     }
62     {
63         std::wifstream fs(temp1.c_str());
64         double x = 0;
65         fs >> x;
66         assert(x == 3.25);
67         fs >> x;
68         assert(x == 4.5);
69     }
70     std::remove(temp1.c_str());
71     {
72         std::wifstream fs(temp2.c_str());
73         double x = 0;
74         fs >> x;
75         assert(x == 4.5);
76         fs >> x;
77         assert(x == 3.25);
78     }
79     std::remove(temp2.c_str());
80 }
81